diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index 027fa45a01..f43b42924b 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -535,7 +535,7 @@ static_library("rtc_base") {
   }
 
   if (is_ios) {
-    all_dependent_configs += [ ":ios_config" ]
+    all_dependent_configs = [ ":ios_config" ]
 
     sources += [
       "macconversion.cc",
diff --git a/webrtc/modules/video_render/BUILD.gn b/webrtc/modules/video_render/BUILD.gn
index 8e67cc6fe0..80f23870aa 100644
--- a/webrtc/modules/video_render/BUILD.gn
+++ b/webrtc/modules/video_render/BUILD.gn
@@ -161,7 +161,7 @@ if (!build_with_chromium) {
 
       deps += [ "../..:webrtc_common" ]
 
-      cflags += [ "-fobjc-arc" ]  # CLANG_ENABLE_OBJC_ARC = YES.
+      cflags = [ "-fobjc-arc" ]  # CLANG_ENABLE_OBJC_ARC = YES.
     }
 
     all_dependent_configs = [ ":video_render_internal_impl_config" ]